Casting-mold.



A. P. SCOTT.

CASTING MOLD. APPLICATION FILED FEB. I. ma.

mm Kay 15, 1917.

2 "KITS-SHEET I.

a anvnfoz $1M W142 A. P. soon.

CASTING MOLD.

APPLICATION FILED FEB. I, ISIS.

1,226,123. Patented 15,1917.

2 SHE MEET 2- 2 d ,7? nvenl'oz 7 UNITED STATES PATENT OFFICE.

ARTHUR P. SCOTT, OF CHICAGO, ILLINOIS, ASSIGNOR TO CHILE EXPLORATIONCOM- PANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

cAs'rIne-mom.

1, 1916. Serial No. 75,477.

To all whom it may concern:

Be it known that I, ARTHUR subject of the King of Great Britain,residing at Chicago, county of Cook, and State and particularly to moldsfor casting magnetite electrodes, which are so constructed as tofacilitate the removal of the electrodes from the molds, and also theproduction of electrodes of uniform properties.

Molten. magnetite, suitable for the production of magnetite electrodes,can be produced, for example, by melting the ore in an electric furnace.The molten magnetite, when ready for pouring, is at a temperature ofabout 1590 C. In order to produce from thismolten magnetite electrodeswhich will be free from defects, it is important that the molds becapable of quick handling in order that the electrodes may not remaintherein longer thanvdesired, and in order that the electrodes may bestripped from the molds with facility. In the production of. hollowelectrodesfand even in the production of solid cast electrodes, it isoften important that means he provided for insuring thatthe top of theelectrode shall not harden before the remainder, and for maintaining abody of molten magnetite extending above the top of the mold until aportion of the magnetite has solidified to form a shell within the mold.I

The novel mold. of the present invention is of particular value for suchpurposes, and enables hollow electrodes to be produced therein, and evensolid electrodes, in a particularly advantageous manner.

The invention is illustrated in the accom- P. Soo'r'r, a.

panying drawings showing one embodiment thereof, and the invention willbe described more particularly in connection therewith.

In the drawings, Figure 1 shows the mold in perspective, and in ahorizontal position, supported by the yoke, parts of which havebeenbroken away;

Figs. 2'and 3 are respectively bottom and top views of the mold;

Ijigs. at and 5 show the parts of themold separated Fig. 6 is asectional View of the detachable top or extension; and a Fig. 7 showsthe mold in an uprightposition, supported in the yoke, and with the topextension thereon.

The mold, as shown is made up of the two parts 1 and 2, held together bypivoted bolts 3 and keys 4. The mold parts are, with advantage, made ofcast gray iron.

By care ful foundry work the interior surface can be- Speciflcation 01'Letters Patent. Patented llay 15, 1911 V Original application fliedNovember 17, 1915, Serial No. 61,904. Divided and this application filedFebruary made sufficiently smooth to eliminate all machine work exceptat the joint planes. This advantage over a machined surface, being moreresistant to the molten magnetite, and

havingless'tendency to warp, as well as being less expensive to produce.v

For convenience of handling, the mold is mounted on trunnions, to permitof its rotation'in a vertical plane. These trunnions 5 are shown asarranged one 011 each of the mold parts. The mold is carried by asuitable conveyer such as an overhead trolley and chain block having asupporting yoke in which the trunnions are mounted. his yokeis made up.of an upper frame member 7 and hook members 6.

A pouring tunnel or top 8 forming an ex tension of the mold, is arrangedthereon, so that it can be removed by sliding and with a shearing effectupon the'niaterial within the mold. In the production of hollowmagnetite electrodes it is advantageous to connect the pouring funnel ortop '8 to the supporting yoke, so that it will be removed when the moldis inverted. without the nece'ssity of removing it"as'a separateoperation. I

' In using the mold for'the production of magnetite electrodes, it isusually pro-limited to about 350 C. so that the chilling i-tl'ect uponthe magnetite will not be too i'e:it,':ui l 1 so that the cracking ofthe electro e will be prevented. In practice, the moldmay also be 'givena. coating of linie or other suitable 1 material, to reduce; he tendencyofthe magiiet'ite to stick thereto. f Where it is desired to producehollow electrodes, )thje magnetite ispoured from thempld'p'ftei'nshell'of solid magnetite of the desired thickness hiis"been formed therein. The'mountifig'of the mold on trunnions fa ci'iitites-"theiquiek pouring of this molten magnetite. I

fliteasting electrodes, and particularly hollow magnetite electrodes, inan open in'o'ld, .it -was' found difficult .to obtain; an eleetrodmterva idisc 'harged; This'left-a anon-6t theinolt'en in-' i r pidiy hid even-he inlfli'e thieknes'slofjth'e' wall, and

settinjE'upYstriI-ins'. which often caused failare 8 desired to retainthe moitenlnag j in the" moldfor fil-rtheti Eiifids 0f the upping-his"-i1lus't connected' b "af ehei in which t'geimolfl -r 1 "automaticallyrein" ed'w I molq ris the pivotal=support 3 of the in d eel nf nite? theinvention, iwhichucomprisesya' inol e with a, erfect nec k. In the timef llowed: or a; solid "wall ot magne t 'rrthemoldmvithick skin roughbefore the interior each 'ofsaid means optimise d sheann onel"endi' eti81 vmold is of considerable thickness, it may with advantage splitdiagonally along its major axis so that the electrode can be removedwithout; binding. With thinner electrodestliere is less dnn'ge'rofbinding at the'comers. and the use of a diagoniilly'split mold may notnecessary- It will of. course. beunderstood that the size and 'proortions of- .the -m old'- :can 'be varied, and :1; et its details ofconstruction can also be 'varied, withoujt departi from t i iiv'hich'"handled and 'tiik'ennpa'rt jand ib: I

eanbe readil whichapfr'ov "te el i-Qn u motel mold for onstin "des'lieviiig'piyots'ion Whic d 15 1? h k shs11'hasiomedin v 1d. -and*me ansifoi-{she'an shellat the time" of "poor- --A metal 'mold' onei stin'g'magnetite, i lity of parts'r'eiiidily ther, a'trunnion on parts orminga' trensverse axis-on which said oidumay be swung'tq flour; outthe-liquid 1 ag netite I after a. shell as-fo meuwith' endautomatio o in1- A. metal meld,

f' AQm ldnf mi ting/ m t t i f I moild bem'giof cast iron and "splitdiaigonally- 1 into two parts, readily detachable mean 9 securing saidpertstog'ethenu trunnio e ,-1n' .fsc th s; rocedure. f1l1'e keys formedwithin the mold and a pouring fnnextension thorvof, and means forremoving nel fm-nnng all uxtenslon of said parts and sand topnntonmtlcnlly when the mold 1s m- I'Qll'lOVilblG therefrom \vlth ashearlng moveverted 1n szu'd support; substantially as de- 0 ment.svriheii.

5 A mold structure .c .in1prising a divided In testimony whereof I affixmy Signature.

mold, means for pivotally supporting the i same, a rei'novable topsection forming an- ARTHUR P. SCOTT.

Gopicl of this pat ent may be obtained for the cents each, by addressingthe "commissioner of Inhntn. Washington, D. 0. Y

